WO2017216449A1 - Motor vehicle roof trim giving the impression of a starry sky - Google Patents

Motor vehicle roof trim giving the impression of a starry sky Download PDF

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Publication number
WO2017216449A1
WO2017216449A1 PCT/FR2017/051440 FR2017051440W WO2017216449A1 WO 2017216449 A1 WO2017216449 A1 WO 2017216449A1 FR 2017051440 W FR2017051440 W FR 2017051440W WO 2017216449 A1 WO2017216449 A1 WO 2017216449A1
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WO
WIPO (PCT)
Prior art keywords
panel
light sources
support panel
roof
light
Prior art date
Application number
PCT/FR2017/051440
Other languages
French (fr)
Inventor
Michel Surugue
Whilk Marcelino GONCALVES
Original Assignee
Psa Automobiles S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Psa Automobiles S.A. filed Critical Psa Automobiles S.A.
Priority to CN201780037012.3A priority Critical patent/CN109562724B/en
Priority to EP17735192.1A priority patent/EP3468840B1/en
Publication of WO2017216449A1 publication Critical patent/WO2017216449A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/70—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose
    • B60Q3/74—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps
    • B60Q3/745—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps using lighting panels or mats, e.g. electro-luminescent panels, LED mats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/50—Mounting arrangements
    • B60Q3/54—Lighting devices embedded in interior trim, e.g. in roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B60R13/0212—Roof or head liners

Definitions

  • the present invention relates generally to the interior equipment of a motor vehicle. It aims in particular a headlining of such a vehicle. Background of the invention
  • a headlining of a motor vehicle is conventionally constituted by a support panel intended to be fixed against the roof of the vehicle and whose face turned towards the interior of the passenger compartment is covered by a sheet of finished textile covering participating in the decoration of this cabin.
  • this sheet of coating may have different colors or comprise patterns made by screen printing, by heliography or by laser etching.
  • a headliner comprising:
  • a first support panel intended to be fixed against the roof of the vehicle
  • this second panel gives the headliner a smooth and uneven rendering while the textile covering sheet makes it possible to conceal the daylight sources when the latter are extinguished while allowing at least part of the light rays to pass through. they emit when turned on.
  • this second panel Formed generally from a rigid plate obtained from a thermoplastic polymer such as polymethyl methacrylate (PMMA), this second panel reflects the acoustic waves passing through the passenger compartment which causes an increase in the level of ambient noise in the passenger compartment. particularly unpleasant for passengers.
  • PMMA polymethyl methacrylate
  • the invention therefore aims to propose a solution at least partially overcoming these disadvantages.
  • a motor vehicle headlining comprising: a first support panel intended to be fixed against the roof of said vehicle,
  • said liner being characterized in that said second panel is an open cell foam.
  • This material also makes it possible to considerably limit the increase in mass generated by the presence of this second panel.
  • this second panel has a flexibility to adapt to vehicle pavilions with curved profiles.
  • said foam is obtained from a thermoplastic polymer chosen from polyether and polyurethane;
  • said foam has a density of between 20 Kg / m 3 and 50 Kg / m 3 ;
  • said second panel is obtained by cutting from an extruded foam plate
  • said light sources consist of light-emitting diodes; said through orifices have a frustoconical shape flaring downwards from the upper face of said second panel so as to match the emission cones of said light sources;
  • said through orifices are made by ablation of material via a laser beam
  • said light-permeable textile covering sheet consists of a three-dimensional mesh fabric made by weaving or knitting from polymer fibers of natural or synthetic origin;
  • said textile covering sheet and said second panel have substantially identical hues;
  • said first support panel is formed of a laminated material consisting of agglomerated glass fibers.
  • FIG. 1 shows a bottom view of a motor vehicle roof provided with a gasket according to the invention.
  • FIG. 1 is a sectional view of the headliner of Figure 1.
  • Figure 1 shows the flag 1 sheet metal of a motor vehicle whose inner face supports a headliner 10 according to the invention.
  • this headliner 10 is constituted by:
  • a first support panel 11 intended to be fixed against the roof 1 of the vehicle; a flexible printed circuit electronic film 12 applied against the lower face 11A of this first support panel 11 and carrying a plurality of point light sources 13 distributed in an irregular manner so as to give the impression of a starry sky;
  • the first support panel 11 is preferably formed in a laminated material advantageously consisting of agglomerated fibers, for example glass.
  • the flexible electronic film 12 (or "flexboard” in English) conventionally consists of a flexible insulating sheet on which are affixed conductive electronic tracks covered with an insulating material.
  • the point light sources 13 implanted on the lower face 12A of this flexible film 12 are preferably constituted by blue light-emitting diodes (LEDs) coated with a thin phosphor layer so as to emit a white light whose hue may vary depending on the proportions of phosphorus dye used.
  • LEDs blue light-emitting diodes
  • the second panel 14 is constituted by an open-cell foam, preferably obtained from a thermoplastic polymer such as polyether or polyurethane and advantageously having a density of between 20 Kg / m 3 and 50 Kg / m 3 .
  • the fact of opting for such a foam can significantly limit the increase in mass generated by the presence of the second panel 14 while ensuring effective absorption of acoustic waves passing through the passenger compartment (and in particular in the medium and high frequencies greater than 1000 Hz).
  • the panel 14 can also be obtained from a simple extruded foam plate then cut to the appropriate dimensions: the deformability of the foam then allowing it to come to marry the profile of the complex formed by the first support panel and the flexible electronic film 12. This solution has the advantage of being particularly economical since it avoids the use of specific injection molds for the manufacture of this panel 14.
  • the light-permeable textile coating sheet 16 is advantageously constituted by a three-dimensional mesh fabric made by weaving or knitting from naturally occurring polymeric fibers such as cellulose or synthetic fibers such as polyester, polyamide or polypropylene. .
  • This type of coating also has the advantage of diffracting the light emitted by the LEDS so as to generate a flickering effect of the light spots offering the user a visual impression approaching a real starry sky.
  • this textile covering sheet 16 and the second foam panel 14 have substantially identical shades (this panel 14 being indeed visible by the passengers through the coating 16).
  • the first fiber support panel 11 is first thermoformed so as to adopt the curved profile of the sheet metal roof 1 of the vehicle.
  • the orifices 15 are then made on the foam panel 14 by a material ablation process using a three-dimensional laser head to adapt to all topologies and possible differences in altitudes.
  • the flexible complex formed by the second foam panel 14 and the textile covering sheet 16 is finally applied against the assembly constituted by the first support panel 11 and the flexible printed circuit electronic film 12, advantageously by a heat-cladding process negative.
  • the flexible complex 14, 16 is heated to a temperature between 150 ° C and 220 ° C and then positioned against a matrix (the liner sheet 16 being oriented towards this matrix while the foam panel 14 is turned away from the latter).
  • the vacuum is then performed between the matrix and the complex 14, 16 so as to cause the plating of the latter which then marry the shape of this matrix.
  • the lower face 12A of the assembly 11, 12 against which the flexible complex 14, 16 is to be applied is then covered with a layer of heat-activatable glue while its opposite face constituted by the upper face of the panel 11 is arranged against a punch perfectly matching its shape.
  • This punch is then translated to the matrix to effect the plating of the hot foam board 16 against the adhesive layer, causing the temperature rise of the latter which is activated and ensures the connection between the flexible complex 14, 16 and the together 11, 12.
  • the headliner 10 can then be removed.
  • Other known methods can of course be used to ensure the assembly between the flexible complex 14, 16 and the assembly 11, 12, such as positive thermo-sheathing or overmolding.
  • the point light sources implanted on the flexible electronic film are of different types: the latter may for example be constituted by organic light-emitting diodes (OLEDS).
  • OLEDS organic light-emitting diodes
  • the orifices 15 are formed by a different method: the latter can for example be obtained by cutting by spraying a jet of water at high pressure.
  • the shape of these orifices is also different, for example cylindrical.
  • this shape can be adapted according to the desired rendering within the limits of the technical constraints of existing processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

The present invention relates to a motor vehicle roof trim comprising a first support panel (11) designed to be attached to the roof (1) of said vehicle, a flexible electronic film having printed circuits (12) that is applied to the lower face (11A) of said first support panel (11) and that has a plurality of punctiform light sources (13) which are distributed irregularly so as to give the impression of a starry sky, a second panel (14) applied to the lower face (12A) of said flexible electronic film (12) and having a plurality of through-openings (15) housing said light sources (13), and a sheet of light-permeable textile lining (16) covering the lower face (40A) of said second support panel (14), said trim being characterized in that said second panel (14) is made of an open-cell foam.

Description

Titre de l'invention  Title of the invention
Garniture de pavillon de véhicule automobile donnant une impression de ciel étoilé Domaine de l'invention  Roof lining of a motor vehicle giving an impression of starry sky Field of the invention
La présente invention concerne d'une manière générale l'équipement intérieur d'un véhicule automobile. Elle vise en particulier une garniture de pavillon d'un tel véhicule. Arrière-plan de l'invention  The present invention relates generally to the interior equipment of a motor vehicle. It aims in particular a headlining of such a vehicle. Background of the invention
Une garniture de pavillon d'un véhicule automobile est constituée classiquement par un panneau support destiné à être fixé contre le pavillon du véhicule et dont la face tournée vers l'intérieur de l'habitacle est recouverte par une feuille de revêtement textile de finition participant à la décoration de cet habitacle.  A headlining of a motor vehicle is conventionally constituted by a support panel intended to be fixed against the roof of the vehicle and whose face turned towards the interior of the passenger compartment is covered by a sheet of finished textile covering participating in the decoration of this cabin.
Afin de permettre une certaine personnalisation, cette feuille de revêtement peut présenter différentes couleurs ou comporter des motifs réalisés par sérigraphie, par héliographie ou encore par gravure laser.  In order to allow a certain personalization, this sheet of coating may have different colors or comprise patterns made by screen printing, by heliography or by laser etching.
Malgré tout, l'apparence visuelle de ces garnitures de pavillon demeure peu attrayante pour les utilisateurs, surtout de nuit où ces couleurs et autres motifs sont difficilement discernables.  Nevertheless, the visual appearance of these pavements remains unattractive to users, especially at night where these colors and other patterns are difficult to discern.
Pour améliorer le rendu visuel de nuit, il est connu de prévoir sous une feuille de revêtement textile perméable à la lumière, un film flexible conducteur à circuits imprimés portant une pluralité de diodes électroluminescentes (LEDS) traversant la garniture de pavillon et étant réparties de manière irrégulière de sorte à donner l'impression d'un ciel étoilé.  To improve the visual rendering at night, it is known to provide under a light-permeable textile coating sheet, a flexible conductive printed circuit film carrying a plurality of light-emitting diodes (LEDS) passing through the headliner and being distributed in a manner irregular to give the impression of a starry sky.
Toutefois, de jour lorsque le dispositif lumineux est éteint, la feuille de revêtement textile présente aux emplacements des LEDS des protubérances qui dénaturent l'apparence visuelle de la garniture de pavillon. Afin d'améliorer le rendu visuel, la demande internationale de brevet WO 2014/029802 propose une garniture de pavillon comportant : However, by day when the light device is off, the textile coating sheet has at the locations of the LEDS protuberances which denature the visual appearance of the headliner. In order to improve the visual rendering, the international patent application WO 2014/029802 proposes a headliner comprising:
- un premier panneau support destiné à être fixé contre le pavillon du véhicule ;  a first support panel intended to be fixed against the roof of the vehicle;
- un film électronique flexible à circuits imprimés appliqué contre la face inférieure de ce premier panneau support et portant une pluralité de sources lumineuses ponctuelles telles que des diodes électroluminescentes (LEDS) réparties de manière irrégulière de sorte à donner l'impression d'un ciel étoilé ;  a flexible printed circuit electronic film applied against the lower face of this first support panel and carrying a plurality of point light sources such as light-emitting diodes (LEDs) distributed in an irregular manner so as to give the impression of a starry sky ;
- un deuxième panneau appliqué contre la face inférieure de ce film électronique flexible et présentant une pluralité d'orifices traversants logeant lesdites sources lumineuses ; et  a second panel applied against the underside of this flexible electronic film and having a plurality of through holes accommodating said light sources; and
- une feuille de revêtement textile perméable à la lumière et recouvrant la face inférieure du deuxième panneau support.  a light-permeable textile coating sheet covering the lower face of the second support panel.
La présence de ce deuxième panneau donne à la garniture de pavillon un rendu lisse et sans aspérités tandis que la feuille de revêtement textile permet de dissimuler les sources lumineuses de jour lorsque ces dernières sont éteintes tout en laissant passer au moins une partie des rayons lumineux qu'elles émettent lorsqu'elles sont allumées.  The presence of this second panel gives the headliner a smooth and uneven rendering while the textile covering sheet makes it possible to conceal the daylight sources when the latter are extinguished while allowing at least part of the light rays to pass through. they emit when turned on.
Formé généralement d'une plaque rigide obtenue à partir d'un polymère thermoplastique tel que le polyméthacrylate de méthyle (PMMA), ce deuxième panneau réfléchit les ondes acoustiques traversant l'habitacle ce qui entraine une augmentation du niveau de bruit ambiant dans l'habitacle particulièrement désagréable pour les passagers.  Formed generally from a rigid plate obtained from a thermoplastic polymer such as polymethyl methacrylate (PMMA), this second panel reflects the acoustic waves passing through the passenger compartment which causes an increase in the level of ambient noise in the passenger compartment. particularly unpleasant for passengers.
En outre, il alourdit sensiblement la garniture de pavillon et ne peut être appliqué que sur une portion relativement plane du pavillon en tôle. Objet et résumé de l'invention  In addition, it substantially increases the headlining and can be applied to a relatively flat portion of the sheet metal roof. Object and summary of the invention
L'invention vise donc à proposer une solution palliant au moins partiellement à ces inconvénients.  The invention therefore aims to propose a solution at least partially overcoming these disadvantages.
Elle propose à cet effet, une garniture de pavillon de véhicule automobile comportant : - un premier panneau support destiné à être fixé contre le pavillon dudit véhicule, For this purpose, it proposes a motor vehicle headlining comprising: a first support panel intended to be fixed against the roof of said vehicle,
- un film électronique flexible à circuits imprimés appliqué contre la face inférieure dudit premier panneau support et portant une pluralité de sources lumineuses ponctuelles réparties de manière irrégulière de sorte à donner l'impression d'un ciel étoilé,  a flexible printed circuit electronic film applied against the underside of said first support panel and carrying a plurality of point light sources distributed in an irregular manner so as to give the impression of a starry sky,
- un deuxième panneau appliqué contre la face inférieure dudit film électronique flexible et présentant une pluralité d'orifices traversants logeant lesdites sources lumineuses, et  a second panel applied against the underside of said flexible electronic film and having a plurality of through holes accommodating said light sources, and
- une feuille de revêtement textile perméable à la lumière et recouvrant la face inférieure dudit deuxième panneau support ;  a light-permeable textile coating sheet covering the underside of said second support panel;
ladite garniture étant caractérisée en ce que ledit deuxième panneau est constitué par une mousse à cellules ouvertes.  said liner being characterized in that said second panel is an open cell foam.
Le fait d'opter pour une telle mousse permet d'assurer une absorption efficace des ondes acoustiques (et en particulier dans les moyennes et hautes fréquences supérieures à 1000 Hz) et de répondre ainsi aux exigences des passagers concernant le confort sonore à l'intérieur de l'habitacle.  The fact of opting for such a foam makes it possible to ensure an effective absorption of the acoustic waves (and in particular in the medium and high frequencies higher than 1000 Hz) and thus to meet the requirements of the passengers concerning the sound comfort inside. of the cockpit.
Ce matériau permet également de limiter considérablement l'augmentation de masse générée par la présence de ce deuxième panneau.  This material also makes it possible to considerably limit the increase in mass generated by the presence of this second panel.
En outre, de par sa constitution, ce deuxième panneau présente une certaine souplesse lui permettant de s'adapter à des pavillons de véhicule présentant des profils incurvés.  In addition, by its constitution, this second panel has a flexibility to adapt to vehicle pavilions with curved profiles.
Selon des caractéristiques préférées de l'invention, prises seules ou en combinaison :  According to preferred features of the invention, taken alone or in combination:
- ladite mousse est obtenue à partir d'un polymère thermoplastique choisi entre le polyéther et le polyuréthanne ;  said foam is obtained from a thermoplastic polymer chosen from polyether and polyurethane;
- que ladite mousse présente une densité comprise entre 20 Kg/m3 et 50 Kg/m3 ; said foam has a density of between 20 Kg / m 3 and 50 Kg / m 3 ;
- ledit deuxième panneau est obtenu par découpe à partir d'une plaque de mousse extrudée ;  said second panel is obtained by cutting from an extruded foam plate;
- lesdites sources lumineuses sont constituées par des diodes électroluminescentes ; - lesdits orifices traversants présentent une forme tronconique s'évasant vers le bas depuis la face supérieure dudit deuxième panneau de sorte à épouser les cônes d'émission desdites sources lumineuses ; said light sources consist of light-emitting diodes; said through orifices have a frustoconical shape flaring downwards from the upper face of said second panel so as to match the emission cones of said light sources;
- lesdits orifices traversants sont réalisés par ablation de matière via un faisceau laser ;  said through orifices are made by ablation of material via a laser beam;
- ladite feuille de revêtement textile perméable à la lumière est constituée par un tissu à mailles tridimensionnelles réalisé par tissage ou tricotage à partir de fibres polymères d'origine naturelle ou synthétique ;  said light-permeable textile covering sheet consists of a three-dimensional mesh fabric made by weaving or knitting from polymer fibers of natural or synthetic origin;
- ladite feuille de revêtement textile et ledit deuxième panneau présentent des teintes sensiblement identiques ; et/ou  said textile covering sheet and said second panel have substantially identical hues; and or
- ledit premier panneau support est formé dans un matériau stratifié constitué de fibres de verre agglomérées.  said first support panel is formed of a laminated material consisting of agglomerated glass fibers.
Brève description des dessins Brief description of the drawings
L'exposé de l'invention sera maintenant poursuivi par la description détaillée d'un exemple de réalisation, donnée ci-après à titre illustratif mais non limitatif, en référence aux dessins annexés, sur lesquels :  The description of the invention will now be continued by the detailed description of an exemplary embodiment, given below by way of illustration but without limitation, with reference to the appended drawings, in which:
- la figure 1 représente une vue de dessous d'un pavillon de véhicule automobile pourvu d'une garniture selon l'invention ; et  - Figure 1 shows a bottom view of a motor vehicle roof provided with a gasket according to the invention; and
- la figure 2 est une vue en coupe de la garniture de pavillon de la figure 1.  - Figure 2 is a sectional view of the headliner of Figure 1.
Description détaillée d'un mode préféré de réalisation Detailed description of a preferred embodiment
La figure 1 montre le pavillon 1 en tôle d'un véhicule automobile dont la face intérieure supporte une garniture de pavillon 10 selon l'invention.  Figure 1 shows the flag 1 sheet metal of a motor vehicle whose inner face supports a headliner 10 according to the invention.
Comme illustré sur la figure 2, cette garniture de pavillon 10 est constituée par :  As illustrated in FIG. 2, this headliner 10 is constituted by:
- un premier panneau support 11 destiné à être fixé contre le pavillon 1 du véhicule ; - un film électronique flexible à circuits imprimés 12 appliqué contre la face inférieure 11A de ce premier panneau support 11 et portant une pluralité de sources lumineuses ponctuelles 13 réparties de manière irrégulière de sorte à donner l'impression d'un ciel étoilé ; a first support panel 11 intended to be fixed against the roof 1 of the vehicle; a flexible printed circuit electronic film 12 applied against the lower face 11A of this first support panel 11 and carrying a plurality of point light sources 13 distributed in an irregular manner so as to give the impression of a starry sky;
- un deuxième panneau 14 appliqué contre la face inférieure a second panel 14 applied against the underside
12A de ce film électronique flexible 12 et présentant une pluralité d'orifices traversants 15 logeant les sources lumineuses 13 ; et 12A of this flexible electronic film 12 and having a plurality of through holes 15 housing the light sources 13; and
- une feuille de revêtement textile 16 perméable à la lumière et recouvrant la face inférieure 14A du deuxième panneau 14.  a light-permeable textile coating sheet 16 covering the lower face 14A of the second panel 14.
Le premier panneau support 11 est préférentiellement formé dans un matériau stratifié constitué avantageusement de fibres agglomérées, par exemple de verre.  The first support panel 11 is preferably formed in a laminated material advantageously consisting of agglomerated fibers, for example glass.
Le film électronique flexible 12 (ou « flexboard » en anglais) est constituée classiquement d'une feuille isolante souple sur laquelle sont apposées des pistes électroniques conductrices recouvertes d'un matériau isolant.  The flexible electronic film 12 (or "flexboard" in English) conventionally consists of a flexible insulating sheet on which are affixed conductive electronic tracks covered with an insulating material.
Les sources lumineuses ponctuelles 13 implantées sur la face inférieure 12A de ce film flexible 12 sont constituées préférentiellement par des diodes électroluminescentes (LEDS) bleues recouvertes d'une fine couche de phosphore de sorte à émettre une lumière blanche dont la teinte peut varier en fonction des proportions de colorant de phosphore utilisées.  The point light sources 13 implanted on the lower face 12A of this flexible film 12 are preferably constituted by blue light-emitting diodes (LEDs) coated with a thin phosphor layer so as to emit a white light whose hue may vary depending on the proportions of phosphorus dye used.
On optera ainsi suivant les cas pour un blanc « neutre » se rapprochant de la lumière du jour, pour un blanc « chaud » tendant vers le jaune, ou encore pour un « blanc froid » tendant vers le bleu.  We will opt as well for the case of a "neutral" white approaching the light of day, for a "warm" white tending towards yellow, or for a "cold white" tending toward blue.
Le deuxième panneau 14 est constitué par une mousse à cellules ouvertes, obtenue de préférence à partir d'un polymère thermoplastique tel que le polyéther ou le polyuréthanne et présentant avantageusement une densité comprise entre 20 Kg/m3 et 50 Kg/m3. The second panel 14 is constituted by an open-cell foam, preferably obtained from a thermoplastic polymer such as polyether or polyurethane and advantageously having a density of between 20 Kg / m 3 and 50 Kg / m 3 .
Le fait d'opter pour une telle mousse permet de limiter considérablement l'augmentation de masse générée par la présence de ce deuxième panneau 14 tout en assurant une absorption efficace des ondes acoustiques traversant l'habitacle (et en particulier dans les moyennes et hautes fréquences supérieures à 1000 Hz). Le panneau 14 peut en outre être obtenu à partir d'une simple plaque de mousse extrudée puis découpée aux dimensions adéquates : la déformabilité de la mousse lui permettant ensuite de venir épouser le profil du complexe formé par le premier panneau support et le film électronique flexible 12. Cette solution a pour avantage d'être particulièrement économique puisqu'elle permet d'éviter l'usage de moules d'injection spécifiques pour la fabrication de ce panneau 14. The fact of opting for such a foam can significantly limit the increase in mass generated by the presence of the second panel 14 while ensuring effective absorption of acoustic waves passing through the passenger compartment (and in particular in the medium and high frequencies greater than 1000 Hz). The panel 14 can also be obtained from a simple extruded foam plate then cut to the appropriate dimensions: the deformability of the foam then allowing it to come to marry the profile of the complex formed by the first support panel and the flexible electronic film 12. This solution has the advantage of being particularly economical since it avoids the use of specific injection molds for the manufacture of this panel 14.
Les orifices traversants 15, de préférence réalisés par ablation de matière via un faisceau laser, présentent avantageusement une forme tronconique s'évasant vers le bas depuis la face supérieure 14B de ce panneau 14 de sorte à épouser les cônes d'émission des sources lumineuses 13.  The through orifices 15, preferably made by ablation of material via a laser beam, advantageously have a frustoconical shape flaring downwards from the upper face 14B of this panel 14 so as to match the emission cones of the light sources 13 .
La feuille de revêtement textile 16 perméable à la lumière est avantageusement constituée par un tissu à mailles tridimensionnelles réalisé par tissage ou tricotage à partir de fibres polymères d'origine naturelle telles que la cellulose, ou synthétique telles que le polyester, le polyamide ou le polypropylène.  The light-permeable textile coating sheet 16 is advantageously constituted by a three-dimensional mesh fabric made by weaving or knitting from naturally occurring polymeric fibers such as cellulose or synthetic fibers such as polyester, polyamide or polypropylene. .
Ce type de revêtement présente également l'avantage de diffracter la lumière émise par les LEDS de sorte à générer un effet de scintillement des points lumineux offrant à l'utilisateur une impression visuelle se rapprochant d'un véritable ciel étoilé.  This type of coating also has the advantage of diffracting the light emitted by the LEDS so as to generate a flickering effect of the light spots offering the user a visual impression approaching a real starry sky.
De préférence et pour l'obtention d'un rendu visuel optimal, cette feuille de revêtement textile 16 et le deuxième panneau en mousse 14 présentent des teintes sensiblement identiques (ce panneau 14 étant en effet visible par les passagers au travers du revêtement 16).  Preferably and for obtaining an optimal visual rendering, this textile covering sheet 16 and the second foam panel 14 have substantially identical shades (this panel 14 being indeed visible by the passengers through the coating 16).
On va maintenant décrire rapidement un procédé de fabrication possible pour la garniture de pavillon 10.  We will now briefly describe a possible manufacturing process for the headlining 10.
Le premier panneau support 11 en fibres est tout d'abord thermoformé de manière à adopter le profil courbe du pavillon en tôle 1 du véhicule.  The first fiber support panel 11 is first thermoformed so as to adopt the curved profile of the sheet metal roof 1 of the vehicle.
Une couche adhésive est ensuite apposée contre face inférieure 11A de ce premier panneau support 11 pour permettre la mise en place du film électronique flexible à circuits imprimés 12 portant les sources lumineuses ponctuelles 13. Par ailleurs, le deuxième panneau de mousse 14 et la feuille de revêtement textile 16 sont associés entre eux pour former un complexe souple selon l'une des différentes techniques bien connues de l'homme du métier telles que le flammage ou encore le collage par chauffage d'une colle en poudre préalablement interposée entre les deux. An adhesive layer is then affixed against the lower face 11A of this first support panel 11 to allow the introduction of the flexible electronic printed circuit film 12 carrying the point light sources 13. Furthermore, the second foam panel 14 and the textile covering sheet 16 are associated with each other to form a flexible complex according to one of the various techniques well known to those skilled in the art such as flame or heat gluing. a powder glue previously interposed between the two.
Les orifices 15 sont ensuite réalisés sur le panneau de mousse 14 par un procédé d'ablation de matière à l'aide d'une tête laser tridimensionnelle permettant de s'adapter à toutes les topologies et les éventuelles différences d'altitudes.  The orifices 15 are then made on the foam panel 14 by a material ablation process using a three-dimensional laser head to adapt to all topologies and possible differences in altitudes.
Le complexe souple formé par le deuxième panneau de mousse 14 et la feuille de revêtement textile 16 est enfin appliqué contre l'ensemble constitué par le premier panneau support 11 et le film électronique flexible à circuits imprimés 12, avantageusement par une procédé de thermo-gainage négatif.  The flexible complex formed by the second foam panel 14 and the textile covering sheet 16 is finally applied against the assembly constituted by the first support panel 11 and the flexible printed circuit electronic film 12, advantageously by a heat-cladding process negative.
Pour ce faire, le complexe souple 14, 16 est chauffé jusqu'à une température comprise entre 150°C et 220°C puis positionné contre une matrice (la feuille de revêtement 16 étant orientée vers cette matrice tandis que le panneau de mousse 14 est tournée à l'opposé de cette dernière).  To do this, the flexible complex 14, 16 is heated to a temperature between 150 ° C and 220 ° C and then positioned against a matrix (the liner sheet 16 being oriented towards this matrix while the foam panel 14 is turned away from the latter).
Le vide est ensuite effectué entre la matrice et le complexe 14, 16 de sorte à provoquer le plaquage de ce dernier qui vient alors épouser la forme de cette matrice.  The vacuum is then performed between the matrix and the complex 14, 16 so as to cause the plating of the latter which then marry the shape of this matrix.
La face inférieure 12A de l'ensemble 11, 12 contre laquelle le complexe souple 14, 16 doit être appliqué est ensuite recouverte d'une couche de colle activable à chaud tandis que sa face opposée constituée par la face supérieure du panneau 11 est disposée contre un poinçon épousant parfaitement sa forme.  The lower face 12A of the assembly 11, 12 against which the flexible complex 14, 16 is to be applied is then covered with a layer of heat-activatable glue while its opposite face constituted by the upper face of the panel 11 is arranged against a punch perfectly matching its shape.
Ce poinçon est ensuite translaté vers la matrice pour réaliser le plaquage du panneau de mousse chaude 16 contre la couche de colle, entrainant la montée en température de cette dernière qui s'active et assure la liaison entre le complexe souple 14, 16 et l'ensemble 11, 12.  This punch is then translated to the matrix to effect the plating of the hot foam board 16 against the adhesive layer, causing the temperature rise of the latter which is activated and ensures the connection between the flexible complex 14, 16 and the together 11, 12.
Après refroidissement et retrait du poinçon, la garniture de pavillon 10 peut alors être retirée. D'autres procédés connus peuvent bien entendu être employés pour assurer l'assemblage entre le complexe souple 14, 16 et l'ensemble 11, 12, comme par exemple le thermo-gainage positif ou le surmoulage. After cooling and removing the punch, the headliner 10 can then be removed. Other known methods can of course be used to ensure the assembly between the flexible complex 14, 16 and the assembly 11, 12, such as positive thermo-sheathing or overmolding.
Selon des variantes de réalisation, les sources lumineuses ponctuelles implantées sur le film électronique flexible sont de type différent : ces dernières pouvant par exemple être constituées par des diodes électroluminescentes organiques (OLEDS).  According to alternative embodiments, the point light sources implanted on the flexible electronic film are of different types: the latter may for example be constituted by organic light-emitting diodes (OLEDS).
Selon d'autres variantes de réalisation, les orifices 15 sont formés par un procédé différent : ces derniers pouvant par exemple être obtenus par découpe via la pulvérisation d'un jet d'eau à haute pression.  According to other embodiments, the orifices 15 are formed by a different method: the latter can for example be obtained by cutting by spraying a jet of water at high pressure.
Selon encore d'autres variantes de réalisation, la forme de ces orifices est également différente, par exemple cylindrique. D'une manière générale, cette forme peut être adaptée en fonction du rendu souhaité dans la limite des contraintes techniques des procédés existants.  According to still other embodiments, the shape of these orifices is also different, for example cylindrical. In general, this shape can be adapted according to the desired rendering within the limits of the technical constraints of existing processes.
On notera enfin que la présente invention ne se limite pas aux formes de réalisation décrites et représentées, mais englobe également toutes les variantes d'exécution à la portée de l'homme du métier.  Finally, it should be noted that the present invention is not limited to the embodiments described and shown, but also encompasses all the embodiments within the scope of those skilled in the art.

Claims

REVENDICATIONS
1. Garniture de pavillon de véhicule automobile comportant : - un premier panneau support (11) destiné à être fixé contre le pavillon (1) dudit véhicule, Motor vehicle headlining comprising: - a first support panel (11) intended to be fixed against the roof (1) of said vehicle,
- un film électronique flexible à circuits imprimés (12) appliqué contre la face inférieure (11A) dudit premier panneau support (11) et portant une pluralité de sources lumineuses ponctuelles (13) réparties de manière irrégulière de sorte à donner l'impression d'un ciel étoilé,  a flexible printed circuit electronic film (12) applied against the lower face (11A) of said first support panel (11) and carrying a plurality of point light sources (13) distributed in an irregular manner so as to give the impression of a starry sky,
- un deuxième panneau (14) appliqué contre la face inférieure (12A) dudit film électronique flexible (12) et présentant une pluralité d'orifices traversants (15) logeant lesdites sources lumineuses (13), et  a second panel (14) applied against the lower face (12A) of said flexible electronic film (12) and having a plurality of through orifices (15) housing said light sources (13), and
- une feuille de revêtement textile perméable à la lumière - a sheet of textile coating permeable to light
(16) et recouvrant la face inférieure dudit deuxième panneau support (14) ; (16) and covering the underside of said second support panel (14);
ladite garniture étant caractérisée en ce que ledit deuxième panneau (14) est constitué par une mousse à cellules ouvertes.  said liner being characterized in that said second panel (14) is an open cell foam.
2. Garniture de pavillon selon la revendication 1, caractérisée en ce que ladite mousse est obtenue à partir d'un polymère thermoplastique choisi entre le polyéther et le polyuréthanne.  2. Roof lining according to claim 1, characterized in that said foam is obtained from a thermoplastic polymer selected from polyether and polyurethane.
3. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que ladite mousse présente une densité comprise entre 20 Kg/m3 et 50 Kg/m3. 3. Headlining according to one of the preceding claims, characterized in that said foam has a density of between 20 Kg / m 3 and 50 Kg / m 3 .
4. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que ledit deuxième panneau (14) est obtenu par découpe à partir d'une plaque de mousse extrudée.  4. Roof lining according to one of the preceding claims, characterized in that said second panel (14) is obtained by cutting from an extruded foam plate.
5. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que lesdites sources lumineuses (13) sont constituées par des diodes électroluminescentes.  5. Roof lining according to one of the preceding claims, characterized in that said light sources (13) are constituted by light emitting diodes.
6. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que lesdits orifices traversants (15) présentent une forme tronconique s'évasant vers le bas depuis la face supérieure (14B) dudit deuxième panneau (14) de sorte à épouser les cônes d'émission desdites sources lumineuses (13). 6. Roof lining according to one of the preceding claims, characterized in that said through holes (15) have a frustoconical shape flaring downwards from the face upper (14B) of said second panel (14) so as to match the emission cones of said light sources (13).
7. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que lesdits orifices traversants (15) sont réalisés par ablation de matière via un faisceau laser.  7. roof lining according to one of the preceding claims, characterized in that said through holes (15) are made by ablation of material via a laser beam.
8. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que ladite feuille de revêtement textile perméable à la lumière (16) est constituée par un tissu à mailles tridimensionnelles réalisé par tissage ou tricotage à partir de fibres polymères d'origine naturelle ou synthétique.  Roof covering according to one of the preceding claims, characterized in that said light-permeable textile covering sheet (16) consists of a three-dimensional mesh fabric made by weaving or knitting from original polymeric fibers. natural or synthetic.
9. Garniture de pavillon selon l'une des revendications précédentes, caractérisée en ce que ledit premier panneau support (11) est formé dans un matériau stratifié constitué de fibres de verre agglomérées.  9. Roof lining according to one of the preceding claims, characterized in that said first support panel (11) is formed in a laminated material consisting of agglomerated glass fibers.
PCT/FR2017/051440 2016-06-13 2017-06-08 Motor vehicle roof trim giving the impression of a starry sky WO2017216449A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780037012.3A CN109562724B (en) 2016-06-13 2017-06-08 Roof trim panel for a motor vehicle providing a starry sky effect
EP17735192.1A EP3468840B1 (en) 2016-06-13 2017-06-08 Vehicle headliner panel giving the impression of a starry sky

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1655409 2016-06-13
FR1655409A FR3052413B1 (en) 2016-06-13 2016-06-13 AUTOMOTIVE VEHICLE PAVILION TRIM GIVING A STAR SKY PRINTING

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CN (1) CN109562724B (en)
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EP3468840B1 (en) 2022-03-30
EP3468840A1 (en) 2019-04-17
FR3052413B1 (en) 2018-07-06
FR3052413A1 (en) 2017-12-15
CN109562724A (en) 2019-04-02
CN109562724B (en) 2022-10-04

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